26
Figure 10
• Position the rotor at the front of the pump, with the use of the appropriate lifting equipment, so
that the taper lock screws are facing forward, away from the pump. Locate the rotor on to
the output shaft and push the rotor on to the shaft ensuring that the shaft key remains in
position, and tighten See Figure 10
Note: The taper lock bush is a standard Fenner part, which can be changed to fit different
diameter output shafts
• To ensure the rotor shoes are centred on the hose, once the pump is running it is necessary
to locate the rotor correctly on the output shaft. The distance required between the rotor and
the front cover is set out below:
Rotor Distance Set Dimension Table
Dimensions VF10 VF15 VF25 VF32 VF40 VF50 VF65 VF80
(mm) 4.0 4.0 12.0 11.0 11.5 11.0 18.5 21.5
(inches) 5/32 5/32 1/2 15/32 15/32 15/32 11/16 13/16
Note: Depending on the model of pump that is being assembled you can either use two metal
engineering rules or a long metal straight edge and an engineering rule, to set the rotor distance
correctly (see fig.11)
